Ooal oe book drill



(No Modl.)

' 3 Sheets--Sheet 1. J. HENWOOD.

GOAL 03 ROCK DRILL.

No. 358,036. Patented Feb. 22, 1887.

(No Model.) v 3 Sheets-Sheet 2.

J. HENWOOD' GOAL 0R ROCK DRILL.

No. 358,036. Patented Feb. 22, 1887.

I Q 2v WX A m l 3 Sheets-Sheet 3.

(No Model.)

J. HENWOOD.

GOAL OR ROCK DRILL.

Patented Feb. 22, 1887.

N. PETERS. PhnXn-Lillwya hur. Walhington. o. c.

UNITED STATES PATENT OFFICE.

JOHN HENVVOOD, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO JOHN C. MARTIN, OF SAME PLACE.

COAL OR ROCK DRILL.

SPECIFICATION forming part of Letters Patent No. 358,036, dated February 22, 1887.

Application filed June 10, 1584.

To aZZ whom it may concern:

Be it known that I, JoHN HENWOOD, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Coal or Book Drills, of which the following is a specification.

The object of my invention is to construct a light, compact, and readily transportable power-drill for coal or rock; and this object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which Figure 1, Sheet 1, is a side view, partly in section, of myimproved drill; Fig. 2, Sheet 2, an end view, partly in section; Fig. 3, Sheet 3, a sectional plan View; Figs. 4 and 5, transverse sections, respectively, on the lines 1 2 and 3 4, Fig. 1; and Fig. 6, a side view of part of the device.

A is the main or fixed column or standard of the drill, having at the top a spur, a, and at the lower end a screw-rod, 1), adapted to a nut, 11, on the frame, so that by turning the rod the standard can be securely clamped between the floor and roof of the chamber or breast in which the machine is to work.

The standard A is preferably composed of angle or channel bars bolted to top and bottom castings, and guided vertically in the standard are washers B, to bearings in which are adapted the trunnions d of the frame D, which projects both in front and rear of the standard, and has suitable bearings for the guidance and support of the drill-rod F.

The washers B are connected by suitable bolts, 0, filling-pieces 0' being interposed to keep the blocks at a proper distance apart, and to the upper filling-piece is attached the lower end of a chain, f, which passes over a chain-wheel, G, the spindle g of the latter being adapted to hearings in the standard A, and havinga ratchet-wheel, g, to which is adapted a pawl, g", so that the accidental descent of the block F is prevented. The spindle g has a squared end for the reception of a crank, whereby said spindle can be turned to raise or lower the block, the free end of the chain f hanging down in the rear of the standard A. The connected washers B and their support- SerinlNo. 134,411. (No model.)

ing devices thus form a carrier for the drillframe D. The trunnions d of the frame D pass through slots e in the standard A, and through openings in clamp-plates O, which are caused to press upon the standard by means of bolts 0, screwed into the ends of the trunnions, so that the frame D can, by tightening these bolts, be locked at any desired angle to which it has been adjusted. The frameD is enlarged at the rear for the reception of a pair of rollers, H H, and a two-part nut, J. The rollers H H bear upon the drill-rod, and the shaft of the roller H has a crank, whereby said roller can be turned when it is desired to move the drill rapidly forward or backward. The feeding of the drill, however,when at work, is ef fected by a screw-thread, h, upon the drillrod, the nut J being adapted to this thread. Each part of the nut J has a stem, 73, projectinglaterally through the frame D, and through a slot, m, in a lever, K,which embraces and is hung to the frame D, and on each stem 3 are pins 1t, adapted to camslots a, formed in the lever, so that by vibrating the lever the two halves of the nut may be forced into engagement with the threaded portion of the drillrod, or may be retracted so as to free the same. The lever Kis made in halves, so as to facilitate the application of the same to the frame D, which is recessed for the reception of thelever.

The drill-rod has a slot, 10, for the reception of a spline in a WOl'lllWllGGl, M, carried by the rod, and contained in a casing, M, on the frame D, so that while the drill-rod is com pelled to turn with said worm-wheel it can slide through the same.

The wornrwheel is driven byaworm, N, on a shaft, P, this shaftbeing adapted to hearings in the frames S of a pair of engines, T, by which the shaft is directly driven, the frames being arranged one on each side of the standard A, and being secured to the frame D by bolts 3 and t, so as to form practically a part of said frame D. The latter can be raised or lowered and secured at any desired altitude or incline tion by means of thesupporting and clamping devices shown.

Owing to the distribution of the parts, as shown, compactness is insured, and the weight is so distributed that the machine is well balanced, and can be readily transported and set up, and can be run at high speed without excessive vibration of the frame D.

I claim as my inventi0n- 1. The combination ofthestandard,the drillcarrying frame adjustable thereon, the drillrod, and engines located on opposite sides of and carried by the drill-frame, said engines having a crank-shaft common to both and geared to the drill-rod, all substantially as specified.

2. The combination of the slotted standard, opposite washers guided therein, adrill-carrying frame trunnioned in said washers, outer bearing-plates, and set-screws, whereby each side bar of the standard is clamped between a washer and bearing-plate, all substantially as specified. 

